Answer:I
2
+I
−
⇌I
3
−
. This reaction is set up in aqueous medium. We start with 1 mole of I
2
and 0.5 mol of I
−
in 1 L flask. After equilibrium, the excess of AgNO
3
gave 0.25 moles of yellow ppt. Then the equilibrium constant is:
Explanation: